Temperature-regulating apparatus.



A. THEOBALD.

TEMPERATURE REGULATING APPARATUS.

APPLICATION FILED JULY 17, 1911.

1 51 5251 Patented Jan.28, 1913.

2 SHEETS-SHEET 1.

I Inventor.

A. THEOBALD.

TEMPERATURE REGULAT ING APPARATUS, APPLIQATIQN ILED JULY17, 1911,

2 SHEETS-SHEET 2.

a, .2 wafer.

Patented M11428, 1913.

protected from injury.

. used in connection with composing machines of the invention.

ALBERT THEOBALD,

OF PARIS, FRANCE.

TEMPERATURE-REGULATING APPARATUS. I

To all whom it may concern Be it known that I, ALBERT TunonaLn, citizen of the French Republic, residing at Paris, Department of the Seine, in France, have invented certain new and useful l mprovemcnts in or Relating to Temperatureltegulating itpparatus, of which the following is a specification.

This invention relates to thermostatic valves, designed to keep constant a supply of heat, by automatic operation.

The main object of the invention is to provide such a device of improved type and all of whose working parts shall be thoroughly Various other objects will appear however as the specification proceeds.

The invention is especially applicable in cases where high temperatures are encoun' tered, so it will be found very valuable when where great heat is necessary to melt the type metal used.

'lroadly the invention consists in provid ing a valve of novel construction, operated by an expansible member, and embedding this; member in a solidified mass of low fusion point.

The invention is embodied in the accompanying drawings but it will be understood that various modifications can take place without departing from the spirit or scope In the accompanying drawings, Figure l is a longitudinal section of a device according to this invention, Fig. :2 a side elevation, partly in section, and. Fig. 3 a modified construction. Fig. 4 is a side elevation partly in section of the thermostatic device used in conjunction with the metal pot of a composing machine.

The a;pparatus shown in Figs. 1 and 2, comprises a casing which is screwed on the body 16 of the gas valve and dips into the pot, the temperature of which it is de sired to regulate. The casing contains at 17 a quantity of easily fusible metal into which dips a spiral 1 made of two iron and copper strips arranged back to back, the copper being on the inside. The spiral is secured at one end and provided at the opposite end with a very light arm 2 which by means of a rod 4 acts on the mechanism regulating the admission of gas. The body of; the valve carries two pipes 10 and 14 screwed Specification of Letters Patent.

Application filed July 17, 1911.

into the part 16, the former pipe being con-- Patented J an. 28,1913.

Serial No. 638,919.

nected to the inlet pipe for the gas, and the second to the heating burner. These two conduits open into a chamber 13 having a screw-threaded interior and made in the part 16. Within the said chamber is screwed a cylindrical plug 7 comprising a passage 5 extending throughout a portion of its length and connected by radial openings 8 to a circular groove 11 arranged at the outer portion of the plug 7. At the end of the conduit 5 is arranged a valve .3 in contact with a rod a l; which passes :treely through the body 16, and the end of which is connected to the rod 2. A washer- 6 perforated at the center to allow the rod i to pass, maintains the valve 3 in position but leaves it a certain amount of play. The cylindrical plug 7 has openings 12 which enable gas to pass into the portion of the chamber 18 communicating with the pipe let.

To the end of the body 16 is secured a cover 9 which insures an air tight closing.

The operation of the device is as follows: The apparatus is first of all adjusted for a given temperature (for instance of 290 in the case of the application to a type casting 'inachine). This adjustmentis effected by screwing the plug 17 into the chamber-41.3 to a greater or-less extent. .The cover 9 having been firmly screwed on, and the apparatus put in place in the pot, the burner with the large flame is lighted soas to'bring about the melting of thelead contained in the said pot. The temperature gradually rising the metal at 17 will be melted also. As the strip with the greater coeliicient of expansion, that. is to say, the copper strip is on the in side, the spiral. 1 will open under the influence of heat. It will act by means of the rods 2 and 4 on the valve 3 which will close the opening of the conduit 5 proportionately to the height of the temperature, and thus will regulate the supply of gas. The latter entering through the conduit 10, groove 11 and conduit 5, reaches the pipe 14.- which feeds the burner. If the apparatus has been properly adjusted, the valve 3 will be applied to its seat at the moment when the temperature is equal to 290. The burner has then merely a weak blue .liame maintained by the gas passing through a recess made in the valve 3. As soon as the temperature drops, the spiral closes, the pres sure of thegaspushes back the valve, and the flame resumes its intensity until the term para-tare again reaches 290, when the valve v is again closed. In that way, the tempera friction is absolutely negligible, and the apture can be maintained practically constant. paratus extremely sensitive, which enables In the constructionshown in Fig. 3, the the temperature to be maintalned constant sensitive element is constituted by a band Within half a degree. Fmally, each tlme 5 formed of two diiferentihetals (for instance that the metal cools the spiral is imprisoned copper and iron). This band is slightly in a metal block. In that Way, deformation curved or flat, and the metal with the of the said strip is avoided, and the regulagreater coeflicient of expansion (copper). is tion permanently insured. arranged at the side opposite to the dis- I cla1m: i 10 tributer. This strip is secured by means'of 1. In a thermostatic valve, a valve pora screw 19 to aboss 18 supported by a plate tion, incoming and outgoing gas passages 20 secured to the body 16 of the valve- Bein said portion, an adjustable valve seat ing almost straight, it is easier to manufacinterposed in said passages, a valve to coture than the double metal spiral of the apoperate with said seat, means to operate said 15-paratus shown in Figs. 1 and 2. .To the valve comprising a casing adapted to With- Y band l is attached an arm 2 which at its stand high temperatures, an expansible upper end is adapted to engage a horizontal :member in said casing, an easily fusible ro 4. The latter is preferably hollow and metal surrounding said expansible member, made of light material such as lass, so as and connections whereby the expansion and 20 toimove'under the action of a sight effort contraction of said member can operate said exercised in the direction of its axis at its fl e free end. At its opposite end it acts on a agas controlling mechanism, a casvalve similar to that previously described ing, a valve carried by a portion of said cas and used for controllingkthe admission of ing, an expansible member carried in a'sec-*'- 25 the gag ondp'ortion of said casing,xan easily fusible v The operation is entire-1 similar to that metal surrounding saidl'member adapted to hereinbefore described. hen the temperabe heated, through the, casing, and iconnecture rises, the double metal band 1 is heated ODS where y the xp n n and "'C U both by the bath 17 and by the radiation tion of said expansible member} can operate T30 of the casing 15. The copper strip arranged 'said valve. v at the right hand side of the band 1, ex- 3. The combination with a valve, of'an pands more than the iron Striparranged operating mechanism therefor com rising a at the left hand side, and has the tendency Casing; an ,expansible member in said cas- 'to bring the arm 2 nearer to the vertical ing, an ieasily fusible material surrounding 35 position. The rod- 4 thus being pushed to said member, said material adapted when the left, acts on the valve and reduces the fused to render the expansible member opadmission of gas, which lower the temerative and when in an unfused state to properature to its normal amount f v tect the said expan'sible member, and con- EIlg. 4 S h0W S-the thermostatic regulating nections between the valve and expansible' 4o devlc'eusedinconjunctionwith ametal'pot member whereby the valve is operated by of a composingmachine. The casing 15 the expansion and contraction of said exgot-the thermostatic device dips into the pansible member. "molten metala22 contained in thepot 21. lfThe combination with a valve, of op- V cover '23 is provided with 'an opening erating means therefor comprising a casing, 45 or .groove 25 to permit"thpassage therea support in said casing, an expansible memthrough of the body rtion 16 of the re '11- her mounted on said support, an easily fusi. I letting device. The-i? urner' 24-; situated. eble metal surrounding saidmember adapted deaththe metal pot: is supplied by gas when unfused to protect the expansible -.th'rou h the (passages 10. and 14, as hereto-1 flnember and when fused to render said so fore escrlbe J ;j{, a} member operable, and connections'between I {The a paratus' de'scribed has the advan- Said member and the valve whereby the I I .t' f, emg y trong. All the parts valve is operated by the expansionand con-v of the mechanism 'are in fact inclosed in an rac ion of sa d e panb b e Inemben airtightcas1ng,"":fd no accidental deterio-ra In testimony whereof I have Ihereunto 55 t oncan take pace. The adjustable porset my hand in presence of two subscribing tlon being accesslbl'only after the plug has witnesses.

been removed the apparatus is thus pro- ALBERT THEOBALDL tected from clumsy manipulation or other Witnesses: i harm. At the same time, as the transmis- H. C. Coxn,

EMILE KLoT.

6Q sion gear does n'ot co'mprise any joints, the 

